Mechanical Engineering question and answers for July 26, 2023
- Q The cantilever is affixed to the free end of a squarecross-section piezoelectric (PZT) block, which is fixed at theother end. Draw the schematic of the lumped-parameter model of thecantilever-PZT system,...
- Q Compare how Griffith determined critical crack length, ac, withhow the value of r*is determined in the solidification process.
- Q Water at 50 °F is being transported from one open reservoir toanother open reservoir using a concrete pipe. The two reservoirsare 1.5 miles apart with a difference in surface elevations...
- Q (Chapter 15)Q: Please give an example of creep.
- Q 3.0 kg of air initially occupying a volume of 0.01 m3 at apressure of 95.0 bar expands in a piston-cylinder assemblyisothermally and without irreversibilities until the volume is 0.05m3. Using...
- Q Materials are subject to changes from temperature. We know thereare several states of matter: solid, liquid, gas, and plasma.However, within a solid-state, materials have their propertiesaffected, in particular brittleness. The...
- Q A spherical motile bacteria with a radius of 1.0 microns and adensity approximately equal to water is swimming in water(temperature 20 C) at a speed of 8.0 microns per second....
- Q This is problem 6-19 from El-Wakil’s Powerplant Technology book-- a 35,000 lbm/h double-effect evaporator receivesmotive steam at 40 psia and 300°F. Pretreated raw water enters at60°F. The pressure in the...
- Q A vestibule type rotating door for a large business has threepanels, each 6 feet wide and 8 feet high has 400 people passingthrough every hour. The panels are fitted with...
- Q (show work)2 If you deposit $1,000 now and are promised payments of $500three years from now and $1,500 five years from now, the equationthat will yield the correct rate of...
- Q 1. Describe the purpose of design guideline of VDI-2206 andVDI-2221.2.Describe how VDI-2221 and 2206 can be implmentedconcurrently3. Describe importance of developing a function block diagram incontext of systematic design
- Q Solve the followingequations using the Newton-Raphason method. ( usingmatlab)x^2+x*y^2 = 9?3x^2 * y - y^3 = 4Â Â ?initial estimation of(x,y) = (1.2, 2.5)?please help.. using matlaband matlab code
- Q An 8 in. diameter grinding wheel, 1 in. wide, is used in asurface grinding operation performed on a flat piece of low carbonsteel. The wheel is rotating with a surface...
- Q Methane is burned with air and the exhaust products are measured(on a dry, volumetric basis) to be 4.8% CO2, 0.12% CO, 12.25% O2,and balance N2. Determine (a) the air-tofuel ratio...
- Q Methane is burned with air and the exhaust products are measured(on a dry, volumetric basis) to be 4.8% CO2, 0.12% CO, 12.25% O2,and balance N2. Determine (a) the air-tofuel ratio...
- Q What are main differences between the Finite Difference Methodand Finite Elements Method?How are the boundary and interior values of the finite elementsolution obtained?
- Q Using MATLAB, Create five scripts for 5 3D polts with differentviews
- Q What are the principal polymers used in fiber-reinforcedpolymers?
- Q what are the main trends in power and wing loading for climb,stall, landing distance, and cruise speed?
- Q Consider a surface that has N sites each of which can adsorb onegas molecule. suppose that it is in contact with a gas with thechemical potential u. Assume that an...
- Q Fluid Mechanics Pipe ProblemType 2 EXAMPLE. Water at 20°C (r=1000 kg/m3 , µ= 0.001 Ns/m2 )is flowing through 100 m 3/8\" steel Sch 80 pipe. Inlet pressure is11 kPa and...
- Q R22 is compressed adiabatically and reversibly from saturatedvapor at -20 deg F to 200 psia. Find the final temperature and thespecific work done.
- Q A counterflow, concentric tube heat exchanger used for enginecooling has been in service for an extended period of time. Theheat transfer surface area of the exchanger is 5 m2, andthe...
- Q A water turbine is placed at the bottom of a hill. It receives Q= 30 m3/s of water from a large lake at the top of thehill. The elevation difference...
- Q What is the typical thurest for small jet engine ?
- Q a.Consider a component (you decide) in an aircraft that issubjected to creep. What standard creep reduction techniques wouldbe best suited?b.How does temperature affect creep rates and why?c.Is there a difference...
- Q Q.8. Super-heated steam at 875 K is flowing through a thickwalled tube of stainless tube with inside diameter 40mm and outsidediameter50mm such that its inner wall is heated to a...
- Q 0.2 kg/s of moist air at 45oC (DBT) and Humidity ratio 0.006kgw/kgda (dry air) is mixed with 0.3 kg/s of moist air at 250C(DBT) and a humidity ratio of 0.018...
- Q Draw the displacement diagram for the motions specified. In eachcase the length of the diagram is to be 120mm, and unless otherwisestated 30 degree intervals (10mm = 30 degrees) are...
- Q 1) The Bay of Fundy-Passamaquoddy area near the border betweenMaine and New Brunswick/Nova Scotia in Canada, is another primesite for tidal power. The basin area is 700km2 and theaverage tidal...
- Q 1) The Bay of Fundy-Passamaquoddy area near the border betweenMaine and New Brunswick/Nova Scotia in Canada, is another primesite for tidal power. The basin area is 700km2 and theaverage tidal...
- Q A 2-Kg mixture of 20% N2 , 30% O2 and 50% CO2 by mass is heatedto 500 K with constant volume. Find The final pressure and thetotal heat transfer needed.
- Q field engineering is a stressful job, why would you choose it bea field engineering?how do I answer this interview question?In other words, how do I show that I am able...
- Q A rigid tank of volume 0.75 m3 is initially evacuated. A holedevelops in the wall, and air from the surroundings at 1 bar, 30°Cflows in until the pressure in the...
- Q Explain and describe the design, the need for, and use ofburnable absorbers. Focus on IFBA types of burnableabsorbers. Â
- Q use a matlab built-in function to numerically solve:dy/dx= -x^2+((x^3*e^-y)/4) for 1<=x<=5 with y(1)=1plot the solution
- Q 2) Explain the meaning of 4 different alloy codes by giving thecomposition and temper condition. State the applications in whichthese alloys can be used and explain the reasons why these...
- Q A 2-m-high, 4-m-wide rectangular advertisement panel is attachedto a 4-m-wide, 0.15 m-high rectangular concrete block (density =2300 kg/m3) by two 5-cm-diameter, 4-m-high (exposedpart) poles, as shown in the figure. If...
- Q Determine the minimum required coolant mass flow rate to avoidboiling using 50/50 Glycol propertiesUnderstand the function of pressure cap. What does a pressurecap do in an automotive cooling system?What is...
- Q Air at 30 C flows at 10 m/s across an in-line tube bank consistof 5 rows with 10 tubes per row. The diameter of the tube is 5 cmand the...
- Q Consider a vertical slider on a rod where the potential energyof the slider at height, h, is used. Derive the impact factor.Assume the slider has a mass, m, the system...
- Q A steam power plant operates with a boiler that is heated from aheat source at 457 °C and produces 450 ton/hr. of steam. The steamleaves the boiler at 425 °C...
- Q How can I create a graph of these differential equations inMathcad?
- Q Steam undergoes an isentropic compression in an insulatedpiston–cylinder assembly from an initial state whereT1 = 120°C, p1 = 1 bar to afinal state where the pressure p2 = 30bar.Determine the...
- Q A set of ceramic parts are tested and the stress required forfailure is measured; the results are as follows: 152 MPa, 260 MPa,500 MPa, 1150 MPa, 700 MPa, 640 MPa,...
- Q According to Breguet range equations, what are techniques toincrease range and endurance?
- Q Steam at 4800 lbf/ in.2, 1000°F enters the firststage of a supercritical reheat cycle including two turbine stages.The steam exiting the first-stage turbine at 600 lbf/in.2 is reheated at constant...
- Q QUESTION 1Which components form the interface between the electronicsignal processor (data processing) and the actual process(mechanical motion)?SensorsActuatorsA/D convertersD/A convertersQUESTION 2Design selection of appropriate actuator is determined byoperating conditions which can...
- Q A piston cylinder device containing 0.5 kg of water hasinitial volume of 0.5L. The device starts and goes through a Carnotcycle and generates 500.3 kJ work. If the maximum temperature...
- Q 5. Commonly used elements for wire strain gauges are__________a) nickel and copperb) nickel and goldc) gold and brassd) silver and aluminum6. Proper functioning of a strain gauge depends on__________a) strainb)...
- Q A cylindrical tube of mean radius 1†and wall thickness 0.1†issubjected to an internal pressure p = 300 psi and a torqueT = 2000 lb-in. The ends of the...
- Q An isentropic pump compresses water between the pressures listedin Problem 1 (30 & 8000 kPa) at the same mass flow rate (3kg/s). Assuming saturated liquid conditions at the inlet of...
- Q Thework input to an ideal pump will always be greater than or equal tothe work input of an actual pump with the same working fluid, InletState, and outlet pressure. True...
- Q Q1. You want to keep the indoor temperature ofan office at 25oC. The outdoor temperature is 5oC. The heattransfer through the building’s exterior is 3 x 106 kJ. To achievethe...
- Q What are some topics to discuss relating to the public, safety,and welfare in regards to the challenger space shuttleexplosion?
- Q Consider a steam power plant operating on a simple ideal Rankinecycle in which the steam enters the turbine at 3 MPa and 350C andis condensed in the condenser at 75...
- Q 5. Estimate the life (in hours) of an 02-series single-rowdeep-groove ball bearing with a 50-mm bore working under thefollowing condition: axial force = 4 kN, radial force = 6 kN,...
- Q Air enters a turbine operating at steady state at 6 bar, 1200 Kand expands to 0.8 bar. The turbine is well insulated, and kineticand potential energy effects can be neglected.Assuming...
- Q Discuss potential methods to linearize body source terms insearch for a stable solution andDescribe:-Relations that could be used to couple pressure and densitywith heat addition-The role or meaning of characteristic...
- Q Discuss potential methods to linearize body source terms insearch for a stable solution andDescribe:-Relations that could be used to couple pressure and densitywith heat addition-The role or meaning of characteristic...
- Q Describe:Where the pressure and density relations are used inSIMPLE-based solutions.The need for characterizing or defining the compressibilityconstant.The most important computational rules in an iterative solutionprocess.
- Q Discuss the:-Motivation for introducing the upwind schemes of Godunov as amethod of solution.-Requirements for different pressure correction equations in aniterative solution process.-Means for having velocity-to-pressure coupling, and thenpressure-to-density coupling.
- Q Re-derive an expression for average NuL (= hLL/k) for flow overa flat plate by integrating the expression for average hL for amixed BL. For Rex,cr, use 123456 (keeping the same...
- Q In a low temperature drying system, air at 60°C and 10% Relativehumidity passes over a bed of diced carrots at 20 kg-dry air/sec.The rate of water removal from the carrots...
- Q A fuel with a stoichiometric formula of C99H148O56N is beingcombusted at a rate of 1 metric tonne/hr in 100% excess air.[1] Calculate the rate of air supply to the combustionchamber.[2]...
- Q I need to design an air nozzle for a compressed air systemwith multiple outlets. All I know about the current system is thereis 109 psi available in the air line....
- Q 1a. The relative humdity outdoor is 70% and the outdoortemperature is 90 degree F what is the actual partial pressure ofwater vapor in the air1b. Humidty ratio (w) is the...
- Q Please prove that in homogeneous nucleation of solidificationthe critical radius and activation energy are ??? = (? 2??????) ( 1) and ???? = (16????3????2 ) 1 , respectively, ????? ???...
- Q The spindle speed for T2 is given.  Describe indetail a way that the spindle speed could be calculated with onlythe dynamometer data, basic information about the tools andanalysis methods.
- Q Explain in detail a method of using data from a forcedynamometer as an unmanned automated monitoring system for aturning process.
- Q Section-I: Technical terms to research and present yourreflections in no more than 10 lines along with a figure/table withproper description, when necessary. Highlight keymeaningful term(s) in the write up. (directlycopying...
- Q Outline the three typical grain structures that develop in castcomponents. Explain how a fine grain size may be promoted incasting.
- Q How an engineer with the proficiency in Engineering Economicsshall handle the situation of which the defender and challengercould co-exist in an engineering related environment ?Explain and elaborate with full details.
- Q Air enters the compressor of an ideal Brayton refrigerationcycle at 140 kPa, 270K and is compressed to 420 kPa. At the turbineinlet, the temperature is 320K and the volumetric flow...
- Q An ideal cold air-standard Otto cycle has a compression ratio of9.2. At the end of the expansion process, the pressure is 110 psi,the temperature is 1020 °R and the specific...
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